Domain specific modeling languages are of increasing importance for the development of software and other systems. Meta tools are needed to support rapid development of domain-specific solutions. Using the Eclipse Graphical Modeling Framework (GMF), modeling languages are defined by providing a meta model using the MOF/EMF approach. Up to now, GMF provides basic editing commands only. It does not support the definition of complex editing commands which would allow e.g. to insert a complex structure into a diagram in one step. As practical tool support for the design and generation of visual editors with complex editing operations based on graph transformation, an extended version of GMF has been developed and is presented in this paper.
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